I feel as though to most of you this may be a silly question that I should already know but here it goes. Why can't I use a faster shutter speed then 1/200 sec. when using my flash? I am taking pictures of someone wakeboarding and need a shutter speed of about 1/1250 to stop the action and when I try and use my flash my camera will not allow me to take any pictures at this shutter speed. When I turn my flash off and take the pictures at 1/1250 sec. the pictures are underexposed and need additional lighting! HELP!